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<p><a href="page.php?w=Shared_memory_%28interprocess_communication%29">shared memory</a> (can be emulated in software with <a href="page.php?w=distributed_shared_memory">distributed shared memory</a>).</p>

<p>In most cases inter-node IPC will be slower than IPC on the same machine, possibly drastically slower for shared memory. Some SSI clusters include special hardware to reduce this slowdown.</p>

<p><big>Cluster IP address</big></p>
<p>Some SSI systems provide a "<a href="page.php?w=cluster_IP">cluster IP</a> address", a single address visible from outside</p><p>
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